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The back channel isn’t just a social space. I noted three distinct, valuable uses of back channels at WebWise:To communicate socially in an environment that does not permit open dialogue. This is the "note passing" or flirting use case.To share your onsite experience with a network of people who are not co-located with you. Where the first use case serves co-located people, this use case focuses on broadcasting the highlights of your experience to friends elsewhere.To investigate a content experience more deeply using a different set of tools than those used to convey the content. For example, you may listen to a speaker and check out related links from his work as he talks.